Rock candy orange, also known as rock sugar orange, is native to Huaihua County, Hunan Province (now Hongjiang City). Sugar Orange is a breed of Hunan Fuyang Red Sweet Orange. It is another name for the high-quality rock sugar orange variety of Xiangyang, China's national geographical indication product. Shuyang County (now Hongjiang City) and Mayang County in Huaihua District have excellent agricultural production conditions. Citrus, which has been well-known in the Ming and Qing Dynasties, has excellent varieties, strong flavor, sweet skin, thin skin and no teeth. The meat is crisp and so popular and is popular in the market. It is a variation of local sweet oranges. It is cultivated in Hunan, and there are a few cultivations in Sichuan, Chongqing, Guizhou, Yunnan, and Guangdong.

According to the maturity, use and market needs of citrus fruits, the harvest period is determined. It is not advisable to pick fruit when the rain and fruit surface are not dry. The fruit picker should wear gloves, cut the fruit together with the fruit handle with a round fruit cut, and then cut the fruit pedicle and gently handle it. Fruits are picked in order from the outside to the inside and from top to bottom. All the containers of the fruit are required to be smooth, and the fruits should be transported to the packing yard or storage in time. Avoid sun and rain.

The navel orange fruit used for storage after harvesting is generally colored on 85% fruit surface, and the best picking when the fruit is not soft. Picking too early, the color and aroma are poor; although the harvest is too late, although it is sweeter, it is not resistant to storage. It is not advisable to apply fertilizer and a large amount of irrigation in the first half of the harvest; it is not suitable for harvesting within three or four days after heavy rain; the harvesting time is best on sunny days. Fruit pickers should not drink alcohol, cut nails flat, and wear soft-soled shoes. The quality of harvesting technology is directly related to the storability of navel orange fruit, and the non-injury fruit is the key to reducing the disease during fruit storage. The fruit should be harvested by two cuts: the first cut should be cut at a distance of 1 cm from the fruit pedicle, and the second cut should be cut flat. When picking, you should do it first and then inside, first and then back and down, and you can't pull it hard to avoid pulling the fruit. In the process of harvesting, it is necessary to gently handle, lightly load and unload, and avoid artificial mechanical damage. At the same time, the diseased fruit, cracked fruit, and deformed fruit should be removed to avoid mixing. The postharvest fruit treatment was carried out using 2,4-D5000 times liquid and methyl thiophanate 800 times liquid as the immersion fruit sterilizing liquid. First, the liquid medicine (2,4-D is dissolved in hot water) is placed in a large tank or a pool, and then the fruit is immersed in the liquid medicine in a bamboo basket (篓), and the surface of the fruit is completely immersed in the liquid medicine. 30 seconds to take out the excess syrup, stacked in a ventilated, dry, cool place, or scattered in the library, stacking height of 30 ~ 45 cm is appropriate, open the window ventilation, naturally dry, after 3 ~ It can be packed in 5 days pre-storage. In addition, it should be noted that the oranges must be cleaned when they are eaten, otherwise the human body may be affected by the disinfectant and symptoms may occur.